Fire-box for boilers.



Patented Apr. 13, 1915.

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HRE BOX FOR BOILERS.

APPLICATlON FILED MAY 20. 19:4.

2 SHEETS-SHEET 2.

Patented Apr. 13, 1915.

Y stafitiz illy as and in dent of Atchison,

INK M. FACOBS, DECEASED, LATE OF ATGHISON, KANSAS,

cr sis.

BY HENRY JACOTBS,

.Sl DMINJESIRATOR, 0F ATCH'ISON, KANSAS.

FIRE-BOX son noimns.

insane.

Atchison, in the county .of Atchison and State of Kansas, am the administrator of the estate of FRANK M. JAcoBs, deceased, late a citizen of the United States, and resi- Kansas, who'had invented certain new and useful Improvements in Fire-Boxes for Boilers, of which the following is a description, reference being had to the accompanyin drawings, which form a part of the speci cation.

The invention relates more particularl to fire-boxes for the ers, although it is readily apparent that certain features of the invention may be employed in connection with boilers of other types.

One object of the invention is to provide a more eflicient fire-box by the provision of heating surfaces in and around the combu tion chamber, composed of water tubes arranged to constitute the side walls of the re-box or combustion chamber. as Well as an intermediate wall; the water tubes arranged to constitute the side Walls being employed instead of the usual stayed side and crown sheets.

Another object of the invention is to provide a fire-box wherein the water tubes which constitute the side Walls as well as.

an intermediate wall, will connect with a hollow mud-ring or header at the bottom of the fire-box or combustion chamber and with headers or chambers at the top, subthe manner illustrated in the accompanying drawings.

By reason of the arrangement of the water tubes, as set forth in the accompanying drawings, a material increase of heating surface is provided, and the combustion chamber divided into two compartments by the intervening wall or partition composed of water tubes, which, however, are so arranged as not to materially decrease the grate area, but increase the surface or surfaces exposed to the hot gases of combustion; the water tubes or heating surfaces being so arranged, however, as not to inter fere with or battle the hot gases in their passages through the fire-fines of. the boiler.

nother object of the invention is to eliminate the difiiculties heretofore encountered in connection with the staying of the hpcoification of Letters 'Jt atent. Application M ma to, ma.

locomotive type of boi 7 Serial no. ceases.

fire-box and shell sheet, which is accomplished by replacing them with water tubes and chambers or headers at the top and with a heavy hollow mud-ring at the bottom; thus providing a non-explosive firebox, which may also be readily ap lied to any ordmaryexisting locomotive boiler.

I The various advantages above enumerated, as Well as other advantages inherent in the construction, will be more readily understood from the following detailed description of the accompanying drawings,

Figure 1 is a longitudinal sectional view of the improved firebox taken on the line a-a of Fig. 2, looking in the direction of the arrows. Fig. 2 is a vertical sectional View taken on the'line b--b of Fig. 1, looking in the direction of the arrows.

In the particular exemplification of the invention as illustrated in the drawings, only a portion of the cylindrical barrel or shell 3 of the boiler is shown, and this shell is secured to the one-piece"--throat-sheet t. While the throat-sheet 4, in the particular construction illustrated, has been shown as a one-piece member, it will be readily understood that the throat-sheet may be altered to fit the boiler-shell of the locomotive to which the improved fire-box is intended to be attached.

In the drawings, Fig. 1, the throat-sheet 4 is preferably shown secured by the rivets 5 to the boiler-shell 3, and to the front head and flue-sheet 6, by means of the rivets 7. The flue-sheet 6 is cut away so as to conform with the lower outside contour of the drums or headers 8, 8*, as more clearly set forth in Fig. 2,. so as to leave the ends of the drums or headers 8, 8, open and in of the fire-box shell.

' Patented Apr. t3, 11915.

The upper or crown surface of the fire box is fornied by a header shown in the nature of a series of transversely curved sheets 55 back head 19..

8, 8., 8, 8, extending throughout the length of the fire-box, with the convexed surfaces presented toward the gases. The sheets, as is very clearly shown in Fig. 2, practically 5 constitute the lower surface of the top header of the fire-box. The sides of the sheets which constitute the side portions -8, 8, of the header. are shown riveted at 10, 10, to the outer shell of the fire-box, while i the opposite sides, as well as the sides of the intermediate plates or portions 8, 8, are secured together with an intermediate stay sheet or member 11, towhich are also preferably secured the sling stays 12. The upper ends of the sling stays 12, are pivotally secured to the members 13, which are properly secured, as at 1-1, to the outer shell. A sutiicient number of stays 19. are provided throughout the length of the shell sections as clearly shown'in Fig. 1. It is evident from the construction shown and described, where the top drum or header is formed with the outer fire-box shell constituting one I wall of the header, that circulation may be had throughout the entire compartment or "chamber intermediate of the supporting stays. Q

T he mudring 15 is preferably in* the nature of'a hollow rectangular frame having a central longitudinal portion 15, as very clearly shown in Fig. 2, and two side h ol low longitudinal portions 15", 15, Wl'lICll are adapted to form the bottom header for the water tubes now to be described. 85 The water tubes 16, 16, are secured to the side longitudinal members or portions 15 15", of the mud-ring, and, therefore, constitute the inner side Walls of the fire-box; while the water tubes 16 are secured to the 40 central longitudinal portion 15 of the mudring and constitute a central wall in the fire-box. I I

The mud-ring 15 has its ends or transversely extendin portions cast solid, with the exception of the upwardly presented openings shown in dotted lines at 17 in Fig. 1. These openings effect communication between the hollow chambers of the longitudinal portions or members of the mud-ring and the water-legs arranged at opposite ends of the fire-box; the front water-leg being formed by the throat-sheet 1 and the flue-sheet 6, While the rear Waterleg is formed by the door-sheet 18 and the The upper surfaces of the longitudinal portions or members of the rnud-rmg: 15 are provided with suitable openings-or holes whichreceive the lower ends of the water to tubes'16, 16", and 16, see Fig. 2; the holes or openings in-the central longitudinal portion 15 of the mud-ring,'being preferably arranged in the"sta,qgered"manner clearly shown in Fig. 2. The bottom surfaces of the longitudinal portions or hollow members of the mud-ring are provided with openings normally closed with suitable threaded plugs as clearly shown at 20; these openings in the bottom surfaces being preferably arranged in alinement with the openings in the top surfaces of the longitudinal members or portions.

The water tubes 16, 16, and 16, are arranged in series so as to constitute the two side walls and a central longitudinal wall in the fire-box; with the alternate tubes 16 communicating with the portion of the druni or header formed by the section 8 on the opposite side of the longitudinal center line of the fire-box and the portion of the header formed by the section 8 on the same side of the fire-box; while the alternate tubes 16, which constitute the other side wall of the fire-box, communicate with the ortion of the drum or header formed by t e section 8, located on the same side of the firebox and with the portion or section 8 located on the opposite side of the longitudinal center line of the fire-box, as very clearly shown inFig. 2. The alternate tubes 16, which constitute the intermediate or central longitudinal wall of the fire-box, communicate at their upper ends with the portions of the drum or header formed by the sections or members 8, 8, located on opposite sides of the fire-box; the upper ends of the water tubes 16, therefore, extend across the alternate tubes of the series '16,

16, as is very clearly shown in Fig. 2; the

tubes 16 therefore effect communication between the central longitudinal portion of the mud-ring and the side portions of the drum or header at the upper end of the fire-box.

With the construction shown and described, it is apparent that the water tubes v 16, 16", and 16, or rather the alternate tubes of the series 16, 16", 16, form an open lattice work over the crown or top of the fire-box through which the hot gases circulate and impinge against the bottom surfaces of the,

respective portions of the drum or header.

The water-tubes 16, 16", and 16, are preferably provided at their upper ends with a double reversebend, see Fig. 2, in order to give the least possible. strain on the tubes due to unequal expansion and contraction.

The water tubes may be secured in the sections of-the drum or header in any approved manner, being preferably, however, welded integrally therewith. l

The ends of the sections 8, and 8", of the drum or header, extend throughout the entire length of the fire-box from flue-sheet to door-sheet, as clearly shown in vFi lathe ends being properly secured to the ue sheet and the door-sheet so as to form a watertight connection, with the ends of the various sections of the header communicating with the water space of the boiler forward access to th nieniii let the fine-sheet and with the water space or leg intermediate of the door-sheet and bitch-head of the fire-box. The door-sheet 18 and the back-head are properly stayed together by means of steyebolts 21, with the two sheets secured together by the rivet 22, with a .calking strip 23 intervening.

' In order that access may be had to the respective, portions or sections of the top drum or header, the back-head i9 is shown provided with the drum-head 24 secured by the stud bolts 25 to the reinforcing ring 26 arranged about suitable openings in the back head 19; the openings being arranged .in elinement with the respective sections or portions, of the drum or header, and the drum-head and ring areso formed-as to provide suitable water-tight connections.

It is apparent from the construction that e various sections or portions ofthe header may be readily had to permit repair work on the water tubes by simply removing the drum-head or heads.

With the fire-boxprovided with a central 'wnllof water tubes,

the back-head of the fire-box and the door-sheet 19 and 18, respectively, are provided with two fire-doors, in order that proper access to both sides of the fire-box may be had; one of the fire-door openings being shown at 27 in -Fig. 1.

As the sections or portions of the watera head do not entirely cover the upper portion of the fire-box, the spaces intermediate of the side'sections or portions and the outer shell, may be provided with a fire-brick lining 28, see Fig. 2, which is shown held in place bysuitable brackets 29, 29, secured to the flue-sheet and to the door-sheet on both sides of the fire-box, while the'upper end of the firebrick lining may beheld in place by suitable brackets 30, 30, which may either be secured to the flue-sheet and door-sheet,

or-to the side sections, 8, 8, of the top header. If desired, the fire-brick lining 28, may bev extended down from the header-sections along the outside of'the' side water tubes 16 and 16 to the top of the mud-ring 15, that is, between the water tubes 16 and 16", and the outside wrapper sheet 31 at the rev spective sides of the firebox.

It 'is' apparent from the construction shown and described, that free circulation of the water may be had between the various sections or portions of the topheader, and

the longitudinal sections or portions of the mud-ring, by means of the front-and rearwater-legs formed respectively by the throatsheet land flue-sheet 6 and the door-sheet 18 and the back-head 19, and also by means of the series of water-tubes 16, 16", and 16. It is also evident from' the construction shown that circulation is had by means of thJwate'r tubes between the side water-heads of the mud-ring and the side sections or portions of the top header and one of the inter- I As previously stated, the points of com munication between the water tubes 16 and the central longitudinal water head of the mud-ring, gored manner so as to provide a suitable bridge-or metal portion in the mud-ring intermediate of the ends of the water tubes; this method also permits a greater number of water tubes being connected to the respective water heads of the mud-ring as will be readily understood from the construction.

The front and back heads of the fire-box, which are in communication by means of the openings at the ends of the longitudinal sections of the mud-ring, convey ample water to the longitudinal hollow portions or sections of the mud-rin 15 to supply the circulating water to the water. tubes lfi, 16 and 16.

With my improved constructiom'it is apparent that a firebox or combustion chamare preferably arranged in a staglarge and eiiicient heating surface, namely a construction wherein the maximum amount of heat units may be absorbed by the water during its circulation through the respective water tubes and top and bottom headers, thus resulting in a boiler capable of making steam very quickly and very rapidly; furthermore, the construction is such that all the water tubes as well as the top header are readily accessible for purposes of repair, cleaning, etc., without the necessity of a complete dismembering of the fire-box.

T e invention is shown applied to a locomotive type of fire-box, but it is evident from the foregoing description as well as the drawings, that the invention may be readily applied to any style of boiler Without, however, departing from the spirit of the invention, and the application is not limited, therefore, to the exact construction shown and described.

What is claimed is 1. A fire-box, provided with top and bottom fluid-containing headers or members, the top header of a series of concave-convex sheets constituting the lower wall thereof while thetouter shell of the firebox constitutes the upperwall of said, header or member, and Water tubes arranged intermediate of the top and bottom headers or'members so as to constitute' the inner side walls of the fire-box and establish communication between said headers or members.

2; A fire-box, provided'with top and bottom fluid-containing headers or members, the upper wall of the top header or member 1 being formed by the outer shell of thefire box whilethe bottom wall of said header is the fire-box and a lower wall suspended from said shell, andwater tubes arranged intermediate of the'top and bottom fluidcontainingme'ans so as to establish communication between said means, with the upper ends of the water tubes disposed to one side ofthe axes of said tubes and, arranged in a criss-cross manner. I

4. A-fire-box, comprising top and bottom fluid-containing means arranged lengthwise of the fire-box, the top means being formed by the-outer shell of the fire-box and transversely bent sheet of sheets having the sides secured to said outer shell, and water tubes vertically disposed between the top and bet toni means so as to establishcommunication taining means open at the ends thereofand'. m communication with said water-legs and between 'said means.

5. A fire-box, provided with top and bottom fluid-containing headers ormembers, the top header or member being composed of a-series of concavo-convexsheets constituting the lower 'wall thereofwvhile the outer shell of the;fire-box constitutes-the upper wall of said header or member, meanswhereby thelower wall is-yieldingly suspended from said shell, and. water tubesarranged intermediate ofthe top and bottom headers or members so as to constitute th inner'side wallsof the firebox and establish communication between saidlheaders or members.

. 6. A fire-box provided with astront, andrear water-leg, top and bottomafluidecon with the water space of the boiler, the top means beiiig formediby the outernshell of the fire-box and by transversely bentsheetshaving theirjsides secured 'to said outer shell, andwater tubes vertically disposed between the top-and bottom means so as to.

establish communication between said means;

' 7. A fire-boxlprovided with fiuid=contain+ ing means longitudinally .disposedyin, the

, upper and lower parts of the, fire-box, the

fluid-containing means in thcnpper' partof; the firebox-being tormed ,bv the fire-boxl j shell and a lower wall suspended therefrom,

and water tubes arranged intermediate of the top and bottom' fluid-containing means for establishing communication between the means.

s. a fire-box, rovided with top and beta tom fiuid-containing headers or members, the top header or member being composed of a series of concavo-convex sheets constituting the lower wallthereof, while the outer shell of'the fire-box constitutes the upper wall of said header or member, sling-stays whereby said sheets are siispr-ii(led.from the outer shellot the fire-box, and'water tubes arranged intermediate of thetop' and'bottom headers or members sons to constitute the inner side walls of the fire-box and establish communication between said headers or members.

9. A-fire-box, provided with top and bottom fluid-containing headers, the top header being composed of a series of concavo-convex sheets constituting the lower wall thereofwhile the outer shell of the fire-box constitutes the'upper' wall of-said header,staysheets or, members secured intermediate of the adjacent sides of the concavo-convex sheets, slingstays pivotally secured to said stay-sheets or 'members and t6 the outer shell of the fire-box whereby the lowe'r'wall of the top header-is suspended, and water tubesarrangedintermediate of the top and bottom headers so as to constitute the inner side wallsof the fire-box and establish com inunication between said headers.

' 10. A fire-box of the class described, COIH' prising top and bottom fluid-containing means arranged lengthwise of the lire-box,

the top means being formed by the outer 1 shell of thefire-box and by transversely bent sheets having the sides secured to theouter shell and to intervening stay-sheets or mem-- bers, and ---water' tubes vertically disposed between the top and bottom means so as to establish communication between said mca ns.

11. A fire-box of the class described, comnally disposed in the upper and lowerpa-rts prising fluid-containing means longitudi of the fire-box,-the fluid-containing meansinfthe upper part of the firc box being formed by the outer shell of the fire-box and a lower wall composed of transversely.

.bentxsheets, stay-sheetsor members secured intermediate of the adjacentsides' of said sheets, sling-stays pivotally secured to said stay sheets or members and to the outer shell whereby the lower Wallis suspended from the shell,v and water tubes arranged intermediatewof; the top and bottomfiuid containing-means so as-'to establish commits nication between said'means, with the upper ends of thewater tubes disposed to one side of the axesof said tubes and arranged in a] cries-cross manner. i

F312. A fire-beret the class.'described apro 'videdwithn top and bottom :fi'ui'd-containi 11g f 0 means ll headers, the top header being composed of a series of concavo-convex sheets COIXStltlltr' ,ing the lower wallthereof while the outer the series constituting the central wall of the fire-box being arranged in communication with the portion of the top header composed of the sheets disposed along the sides of the fire-box while the alternate tubes of the series constituting the inner side walls of the fire-box are arranged in communication with the sheets or portion of the top header arranged on the same side as the respective series and one of the intermediate sheets disposed on the opposite side of the longitudinal center line of the fire-box, and

means whereby the sheets constituting the lower wall of the top header are suspended from the outer shell of the fire-box.

13. A fire-box of the class described, provided with top and botton fluid-containing headers, the top header being composed of the outer shell of the fire-box and transverscly bent sheets was to provide a lower wall composed of two side'and two intermediate concavo-convcx portions, means where by said sheets are yieldingly suspended from the outer shell of the fire-box, andwater tubes arranged intermediate of the top and bottom fluid-containing headers so as to establish communication between said headers, said water tubes being arranged in series, one series constituting a longitudinally disposed central wall of the fire-box while the other series constitute the inner side walls of the fire-box, the upper endof each alternate tube of all the series being in communication with a difierent portion of the top header.

14. A fire-box of the class described, provided with top and bottom fluid-containing headers, the top header being composed of the outer shell of the fire-box and transversely bent sheets suspended fromthe outer shell, while the bottom header is formed by a mud-ring having hollow longitudinal portions, and water-tubes arranged in series intel-mediate of the top and bottom headers so as to constitute inner side walls and an intermediate wall, with the upper ends of the alternate tubes of the different series being connected with a different sheet of the topheader.

15. A fire-box of the class described, provided with topgand bottom fluid-containin V headers, the top header being composed o the puter shell of the fire-box and a p111- rality of transversely bent sheets, while the bottom header is formed by a mud-ring composed of two side and intermediate hollow longitudinal portions, and water tubes arranged in series intermediate of the side and intermediate longitudinal portions -of the mud-ring and the sheets constituting the bottom wall of the top header, the upper ends of the tubes being arranged in a Gl'lSS-CI'OSS manner so that the alternate tubes of the different series will establish communication between the respective longitudinal portion of the mudring and twotransversely separated portions of the topheader.

16. A fire-box of the class described, comprising a crown-sheet formed so as to provide a plurality'of longitudinally disposed channels, means whereby said crown-sheetis removably stayed to the roof-sheet of the fire-box, a mud-ring provided with waterchambers in the longitudinally disposed portions thereof, and a series of water-tubes arranged intermediate of the chambers of the mud-ring and the channels of the crownsheet, said water-tubes being arranged to constitute inner side walls .for the fire-box.

17. A fire-box of the class described, provided with a front and rear-watenleg, a crown-sheet formcd'of a plurality of separate channeled sections disposed longitudinally of the fire-box, means whereby said sections are secured together and supported from the roof-sheet of the fire-box, a mud ring provided with hollow longitudinally disposed portions arranged to have communication with the front water-leg and the rear water-leg, and means intermediate of the upper surfaces of the hollow longitudinally disposed portions of the mud-ring and the respective channel-sections of the crown-sheet whereby circulation between the portions of the mud-ring and the crowdsheet may be established, said means being arranged to constitute the inner side walls of the fire-box. 1

18. In a fire-box of the class described,

provided with a crown-sheet composed of a HENRY JACOBS.

Witnesses Vi. A. Nnavrrr, S. R. Bonn. 

